The Salt Lake Membrane-Based Lithium Recovery System is an advanced solution for efficiently extracting lithium from salt lake brines, suitable for both sulfate-type and carbonate-type salt lakes. Using multi-stage membrane separation, the system removes impurity ions while concentrating lithium, significantly lowering Mg/Li and carbonate/lithium ratios. This enhances lithium extraction rates and product purity, reduces chemical reagent usage, minimizes wastewater discharge, and provides strong environmental and economic benefits.
The system is tailored for different salt lake types:
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Sulfate-Type Salt Lakes:
Low-mineralized brines undergo pre-filtration before entering the membrane system. Nanofiltration (NF) and reverse osmosis (RO) membranes remove calcium, magnesium, sulfate, and other impurities, concentrating lithium. High-mineralized, aged brines first undergo lithium enrichment via adsorption before membrane separation to achieve efficient lithium recovery.
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Carbonate-Type Salt Lakes:
Raw brine is pre-filtered and then processed through multi-stage membranes. Impurities are selectively removed, lithium is enriched, and Mg/Li and carbonate/lithium ratios are reduced, improving subsequent lithium extraction efficiency.
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The membranes operate on selective ion permeation: impurity ions are retained, while lithium ions pass through. The system can adapt processing parameters according to brine mineralization levels, ensuring stable and high-efficiency lithium recovery.
l Wide Adaptability: Designed for both sulfate and carbonate salt lakes, capable of handling various brine mineralization levels
l High Impurity Removal: Effectively removes calcium, magnesium, sulfate, and other ions, dramatically lowering Mg/Li ratios (e.g., sulfate-type from 28:1 to 1.6:1; carbonate-type carbonate/lithium ratio down to 2:1)
l Flexible Process Design: Low-mineralized brines can be processed directly; high-mineralized brines can be pre-adsorbed before membrane separation
l Eco-Friendly and Cost-Efficient: Reduces chemical usage and wastewater discharge, maximizing resource efficiency and economic benefits
l High Lithium Recovery: Membrane technology ensures high lithium recovery rates with high-purity output
l Salt Lake Lithium Extraction: Ideal for high Mg/Li and high-mineralized brines in regions such as the Qinghai-Tibet Plateau and other lithium-rich salt lakes
l New Energy Industry: Recovered high-purity lithium can be used for lithium-ion batteries, energy storage systems, and other renewable energy applications, supporting electric vehicles and energy storage solutions
l Mining and Resource Recovery: Enhances lithium extraction and recycling efficiency from salt lakes and other lithium resources, improving overall resource utilization
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